From 7b803ac5574259f457ef7bf27c305ab2b2bbd167 Mon Sep 17 00:00:00 2001
From: Gilles Gouaillardet <gilles@rist.or.jp>
Date: Wed, 6 Apr 2016 09:45:45 +0900
Subject: [PATCH] MPI_Unpack: fix error code when insize <= 0

this fixes a regression from open-mpi/ompi@f2e33c725fa77cfd8ecd585d131e9ae4c6497714
---
 ompi/mpi/c/unpack.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ompi/mpi/c/unpack.c b/ompi/mpi/c/unpack.c
index 133653e860..2bc5894069 100644
--- a/ompi/mpi/c/unpack.c
+++ b/ompi/mpi/c/unpack.c
@@ -101,6 +101,8 @@ int MPI_Unpack(const void *inbuf, int insize, int *position,
         rc = opal_convertor_unpack( &local_convertor, &outvec, &iov_count, &size );
         *position += size;
         OBJ_DESTRUCT( &local_convertor );
+    } else {
+        rc = 1;
     }
 
     OPAL_CR_EXIT_LIBRARY();